pmoto-uthoqrapher



datiert tatee HENRY F. MANN, OF PITTSBURG, PENNSYLVANIA.

Letters Patent N 100,303, dated March 1, 1870.

'The Schedule referxed to in these Letters Patent and makngpax': o! the same.

To all whom it may concern:

Be it known that I, HENRY F. MANN, of Pittsburg, in the county of Allegheny, and State of Pennsylvania, have invented certain new and useful Improvements in Shaft-Couplings; and 1 do hereby declare the following to be a full, clear, andgexact description oftheconstruction and operation of the same; reference heilig had to the accompanying drawings making a part of this specification, in whichh Figure l represents in perspective the coupling as applied to the shafts.

represents a longitudinal section through and external cylinders with corresponding interior double conical bearing surfaces and binding pins or keys and bolts, as will be hereinafter explained, together with holt-seats in the cylinders and double cone-sleeve or hub, so that drawing the exterior cylinders together tightens up and makes rigid the coupling of the shafts.

lo enable others skilled in the art to make and use my invention, I will proceed to describe the same.

The ends c a ofthe two shafts A B that are-to be coupled together are squared up, so as to abut against each other, and over the jointbetween the shafts is slipped orlaid the conical sleeve or huh C, either split, as seen at b, tig. 4, or made in twb parts or. sections, as seen at o c, iigs. 3 and 5.

1f only split or having but one cut, kerf, or slot throughit lengthwise, as in tig. 4, then a pin or key is passed through the sleeve or hub and into an opening or seat in each of the ends of the shafts, a shortdistance from the joint.

But if the sleeve or hub C be made in sections or vin two parts, as shown at iigs. 3 and 5, then the pin er key d may be made fast on or in one of the sections, and be laid or passed into their seats respectively .on the ends of the two shafts by the act of placing said section upon the parts of the shafts to be coupled.,

'lhe sleeve or hub C is made tapering or conical both ways from its center, as seen lmore distinctly in tig. 6, and has holt-seats e e cut longitudinally through t-h'em; and these seats may be in the line and plaire of the slots, as in tig. 3, or in or through the solid metal, as seen in g. 5, or one along the slot, and one in the solid metal, as seen in tig. 4.

'Two cylinders D E are then provided, with their interior made conical or'tapering, so as to tit snugly over the conical or tapering surfaces of the sleeve or hub 0,;aud'so that they will not entirely meet when drawn up, buthave an intervening space,f, between them.

lhe'outer ends or heads g of thecylinders are solid except for the bolts 't i and shaft to pass through, and space h left between the inner surfaces ofthe heads and the ends of the sleeve or hub, so that the cylinders can be drawn up onto the conesurfaces of said hub to make the latter more rigidly gripe and bind upon the ends of the shafts; the spaces j in the hub admitting of its being contracted circuinterentially by the drawing up of the cylinders by the screw-bolts upon its conical surfaces.

When the hub or sleeve-is made in two parts or sections, as shown in figs. 3 and 5, its capability ot' being tightly drawn against the shafts is obvious. When a split hub, such as is shown in iig. 4, is used, that is,.with a single slot or split7 then the tightening up ofthe cylinders springs the hub where the key or bolt-seat c is cut out, and the edges of the split j approach each other and cause the necessary circumferential pressure, while the pins ll aid iu holding the shafts together longitudinally.

Having thus fully described my invention,

lVhat I claim' therein as new, and desire t-o secure by Letters Patent iu a shaft-coupling, is-

The combination of the split or sectional hub, with its exterior double cone or tapering surfaces, the cylinders with their interior correspondingly conical or tapering surfaces, the bolt-seats and tightening bolts, or their substitutes, substantially as and for the purpose described and represente-d.

H. F. MANN.

Witnesses:

A. B. S'roUGH'roN, EDMUND Masson. 

